Initiate full_path as RelativePathBuf

This is better than having it as string then converting it to path
whenever we want to use it. It also ensures better interoperability
between operating systems (though it would probably worked fine
beforehand, but better be safe for the future).

3 files changed, 11 insertions, 14 deletions

diff --git a/Cargo.toml b/Cargo.toml
index c57e6ac..89d5c73 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2024"
 [dependencies]
 anyhow = "1.0.102"
 clap = { version = "4.5.60", features = ["derive"] }
-relative-path = "2.0.1"
+relative-path = { version = "2.0.1", features = ["serde"] }
 reqwest = { version = "0.13.2", features = ["cookies", "json"] }
 serde = { version = "1.0.228", features = ["derive"] }
 serde_json = "1.0.149"
diff --git a/src/epub.rs b/src/epub.rs
index 4fc4915..b995767 100644
--- a/src/epub.rs
+++ b/src/epub.rs
@@ -1,6 +1,6 @@
 use crate::models::{Chapter, FileEntry};
 use anyhow::{Context, Result};
-use relative_path::RelativePath;
+use relative_path::{RelativePath, RelativePathBuf};
 use reqwest::{Client, Url};
 use std::{
     collections::HashMap,
@@ -16,7 +16,7 @@ use zip::{CompressionMethod, ZipWriter, write::FileOptions};
 /// Creates and writes container.xml.
 fn write_container_xml_to_zip(
     zip: &mut ZipWriter<std::fs::File>,
-    opf_full_path: &str,
+    opf_full_path: &RelativePathBuf,
 ) -> Result<()> {
     // Prepare file contents.
     let contents = format!(
@@ -43,7 +43,7 @@ pub async fn download_all_files(
     dest_root: &Path,
 ) -> Result<()> {
     for entry in file_entries {
-        let dest_path = dest_root.join(&entry.full_path);
+        let dest_path = entry.full_path.to_path(dest_root);
 
         if let Some(parent_dir) = dest_path.parent() {
             fs::create_dir_all(parent_dir).await?;
@@ -87,7 +87,7 @@ pub fn create_epub_archive(
     write_container_xml_to_zip(&mut zip, &opf_entry.full_path)?;
 
     // Prepare url path to local path mapping to clean xhtml files from external dependencies.
-    let url_to_local: HashMap<String, String> = file_entries
+    let url_to_local = file_entries
         .iter()
         .map(url_path_to_local)
         .collect::<Result<HashMap<_, _>>>()?;
@@ -97,18 +97,14 @@ pub fn create_epub_archive(
         FileOptions::default().compression_method(CompressionMethod::Deflated);
     for entry in file_entries {
         zip.start_file(&entry.full_path, options)?;
-        let mut src_file = std::fs::File::open(epub_root.join(&entry.full_path))?;
+        let mut src_file = std::fs::File::open(entry.full_path.to_path(epub_root))?;
         let mut buffer = Vec::new();
         src_file.read_to_end(&mut buffer)?;
         if chapters.contains_key(&entry.ourn) {
             let mut html = String::from_utf8(buffer)?;
-            let chapter_dir = RelativePath::new(&entry.full_path)
-                .parent()
-                .unwrap_or(RelativePath::new(""));
+            let chapter_dir = entry.full_path.parent().unwrap_or(RelativePath::new(""));
             for (url_path, local_path) in &url_to_local {
-                let rel_path = chapter_dir
-                    .to_relative_path_buf()
-                    .relative(RelativePath::new(local_path));
+                let rel_path = chapter_dir.relative(local_path);
                 html = html.replace(url_path, rel_path.as_str());
             }
             zip.write_all(html.as_bytes())?;
@@ -123,7 +119,7 @@ pub fn create_epub_archive(
 }
 
 /// Helper function. Maps FileEntry to (url path, full_path) pair.
-fn url_path_to_local(entry: &FileEntry) -> Result<(String, String)> {
+fn url_path_to_local(entry: &FileEntry) -> Result<(String, RelativePathBuf)> {
     let url = Url::parse(&entry.url).with_context(|| format!("Could not parse: {}", entry.url))?;
     let url_path = url.path().to_string();
     Ok((url_path, entry.full_path.clone()))
diff --git a/src/models.rs b/src/models.rs
index 4da288e..a3183e6 100644
--- a/src/models.rs
+++ b/src/models.rs
@@ -1,3 +1,4 @@
+use relative_path::RelativePathBuf;
 use serde::Deserialize;
 
 /// Generic Model for paginated API.
@@ -30,7 +31,7 @@ pub struct Chapter {
 pub struct FileEntry {
     pub ourn: String,
     pub url: String,
-    pub full_path: String,
+    pub full_path: RelativePathBuf,
     pub media_type: String,
     pub filename: String,
     pub filename_ext: String,